Various heading and grammar fixes (#2535)

Add missing "Minimum Requirements" heading to:
- notebooks
- rtc
- collab platforms
- Clean up metasearch engine description

Other:
- Various grammar fixes

Signed-off-by: Daniel Gray <dngray@privacyguides.org>
Signed-off-by: Jonah Aragon <jonah@privacyguides.org>

docs/alternative-networks.md

@@ -100,8 +100,8 @@ You can try connecting to *Privacy Guides* via I2P at [privacyguides.i2p](http:/
 
 </div>
 
-Also unlike Tor, every I2P node will relay traffic for other users by default, instead of relying on dedicated relay volunteers to run nodes. There are approximately [10,000](https://metrics.torproject.org/networksize.html) relays and bridges on the Tor network compared to ~50,000 on I2P, meaning there is potentially more ways for your traffic to be routed to maximize anonymity. I2P also tends to be more performant than Tor, although this is likely a side-effect of Tor being more focused on regular "clearnet" internet traffic and thus using more bottlenecked exit nodes. Hidden service performance is generally considered to be much better on I2P compared to Tor. While running P2P applications like BitTorrent is challenging on Tor (and can massively impact Tor network performance), it is very easy and performant on I2P.
+Also, unlike Tor, every I2P node will relay traffic for other users by default, instead of relying on dedicated relay volunteers to run nodes. There are approximately [10,000](https://metrics.torproject.org/networksize.html) relays and bridges on the Tor network compared to ~50,000 on I2P, meaning there is potentially more ways for your traffic to be routed to maximize anonymity. I2P also tends to be more performant than Tor, although this is likely a side-effect of Tor being more focused on regular "clearnet" internet traffic and thus using more bottlenecked exit nodes. Hidden service performance is generally considered to be much better on I2P compared to Tor. While running P2P applications like BitTorrent is challenging on Tor (and can massively impact Tor network performance), it is very easy and performant on I2P.
 
-There are downsides to I2P's approach, however. Tor relying on dedicated exit nodes means more people in less safe environments can use it, and the relays that do exist on Tor are likely to be more performant and stable, as they generally aren't run on residential connections. Tor is also far more focused on **browser privacy** (i.e. anti-fingerprinting), with a dedicated [Tor Browser](tor.md) to make browsing activity as anonymous as possible. I2P is used via your [regular web browser](desktop-browsers.md), and while you can configure your browser to be more privacy-protecting, you probably still won't have the same browser fingerprint as other I2P users, there's no "crowd" to blend in with in that regard.
+There are downsides to I2P's approach, however. Tor relying on dedicated exit nodes means more people in less safe environments can use it, and the relays that do exist on Tor are likely to be more performant and stable, as they generally aren't run on residential connections. Tor is also far more focused on **browser privacy** (i.e. anti-fingerprinting), with a dedicated [Tor Browser](tor.md) to make browsing activity as anonymous as possible. I2P is used via your [regular web browser](desktop-browsers.md), and while you can configure your browser to be more privacy-protecting, you probably still won't have the same browser fingerprint as other I2P users (there's no "crowd" to blend in with in that regard).
 
-Tor is likely to be more resistant to censorship, due to their robust network of bridges and varying [pluggable transports](https://tb-manual.torproject.org/circumvention), but on the other hand I2P uses directory servers for the initial connection which are varying/untrusted and run by volunteers, compared to the hard-coded/trusted ones Tor uses which are likely easier to block.
+Tor is likely to be more resistant to censorship, due to their robust network of bridges and varying [pluggable transports](https://tb-manual.torproject.org/circumvention). On the other hand, I2P uses directory servers for the initial connection which are varying/untrusted and run by volunteers, compared to the hard-coded/trusted ones Tor uses which are likely easier to block.

docs/notebooks.md

@@ -155,6 +155,8 @@ Cryptee offers 100MB of storage for free, with paid options if you need more. Si
 
 **Please note we are not affiliated with any of the projects we recommend.** In addition to [our standard criteria](about/criteria.md), we have developed a clear set of requirements to allow us to provide objective recommendations. We suggest you familiarize yourself with this list before choosing to use a project, and conduct your own research to ensure it's the right choice for you.
 
+### Minimum Requirements
+
 - Clients must be open source.
 - Any cloud sync functionality must be E2EE.
 - Must support exporting documents into a standard format.

docs/productivity.md

@@ -66,6 +66,8 @@ We don't recommend using the [E2EE App](https://apps.nextcloud.com/apps/end_to_e
 
 **Please note we are not affiliated with any of the projects we recommend.** In addition to [our standard criteria](about/criteria.md), we have developed a clear set of requirements to allow us to provide objective recommendations. We suggest you familiarize yourself with this list before choosing to use a project, and conduct your own research to ensure it's the right choice for you.
 
+#### Minimum Requirements
+
 In general, we define collaboration platforms as full-fledged suites which could reasonably act as a replacement to collaboration platforms like Google Drive.
 
 - Open source.

docs/real-time-communication.md

@@ -214,6 +214,8 @@ Session has a [whitepaper](https://arxiv.org/pdf/2002.04609.pdf) describing the
 
 **Please note we are not affiliated with any of the projects we recommend.** In addition to [our standard criteria](about/criteria.md), we have developed a clear set of requirements to allow us to provide objective recommendations. We suggest you familiarize yourself with this list before choosing to use a project, and conduct your own research to ensure it's the right choice for you.
 
+### Minimum Requirements
+
 - Has open-source clients.
 - Does not require sharing personal identifiers (phone numbers or emails in particular) with contacts.
 - Uses E2EE for private messages by default.

docs/search-engines.md

@@ -91,7 +91,7 @@ Startpage previously placed limitations on VPN and [Tor](tor.md) users, but they
 
 ## Metasearch Engines
 
-A [metasearch engine](https://en.wikipedia.org/wiki/Metasearch_engine) allows you to aggregate the results of other search engines, such as the ones recommended above, while not storing any information itself.
+A [metasearch engine](https://en.wikipedia.org/wiki/Metasearch_engine) aggregates the results of other search engines, such as the ones recommended above, while not storing any information itself.
 
 ### SearXNG