Fixed grammar and spelling errors.

Fixed grammar and spelling while keeping the consistent use of 'plugin' and 'inline'.

docs/development.md

@@ -1,6 +1,6 @@
 # Development recommendations
 
-Prior to continue, make sure you've read:
+Before continuing, make sure you've read:
 
 1. [README](https://github.com/markdown-it/markdown-it#markdown-it)
 2. [API documentation](https://markdown-it.github.io/markdown-it/)
@@ -9,17 +9,17 @@ Prior to continue, make sure you've read:
 
 ## General considerations for plugins.
 
-1. Try to understand where your plugin rule sould be located.
+1. Try to find the right place for your plugin rule:
   - Will it conflict with existing markup (by priority)?
     - If yes - you need to write an inline or block rule.
-    - If no - you can morph tokens in core chain.
+    - If no - you can morph tokens within core chains.
-  - Remember that token morphing in core is always more simple than writing
+  - Remember that token morphing in core chains is always more simple than writing
-    block / inline rules (if you don't copy existing ones). However,
+    block or inline rules, if you don't copy existing ones. However,
-    block & inline rules are usually faster.
+    block and inline rules are usually faster.
-  - Sometime it's enougth to modify renderer only (for example, to add
+  - Sometimes, it's enough to only modify the renderer, for example, to add
-    header IDs or `target="_blank"` for the links).
+    header IDs or `target="_blank"` for the links.
-  - Plugins should not require `markdown-it` package as dependency in `package.json`.
+  - Plugins should not require the `markdown-it` package as dependency in `package.json`.
-    If you need access to internals, those are available via parser instance,
+    If you need access to internals, those are available via a parser instance,
     passed on plugin load. See properties of main class and nested objects.
 2. Search existing
    [plugins](https://www.npmjs.org/browse/keyword/markdown-it-plugin)
@@ -52,37 +52,36 @@ can use workarounds:
 
 1. On parse phase, replace content by random number and store it in `env`.
 2. Do async processing over collected data.
-3. Render content and replace those random numbers with text
+3. Render content and replace those random numbers with text; or replace first, then render.
-   (or replace first, then render).
 
-Or you can render html, then parse it to DOM (or
+Alternatively, you can render HTML, then parse it to DOM, or
-[cheerio](https://github.com/cheeriojs/cheerio) AST) and apply transformations
+[cheerio](https://github.com/cheeriojs/cheerio) AST, and apply transformations
-in more convenient way.
+in a more convenient way.
 
 
 #### How to replace part of text token with link?
 
-Righ sequence is to split text to several tokens and add link tokens between.
+The right sequence is to split text to several tokens and add link tokens in between.
-Result will be: `text` + `link_open` + `text` + `link_close` + `text`.
+The result will be: `text` + `link_open` + `text` + `link_close` + `text`.
 
-See implementations of [linkify](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/linkify.js) & [emoji](https://github.com/markdown-it/markdown-it-emoji/blob/master/lib/replace.js) - those do text token splits.
+See implementations of [linkify](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_core/linkify.js) and [emoji](https://github.com/markdown-it/markdown-it-emoji/blob/master/lib/replace.js) - those do text token splits.
 
-__Note.__ Don't try to replace text with html markup! That's not secure.
+__Note.__ Don't try to replace text with HTML markup! That's not secure.
 
 
 #### Why my inline rule is not executed?
 
-The inline parser skips pieces of texts for the best speed. It stops only on [a small set of chars](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_inline/text.js), which can be tokens. We did not made this list extendable, also for performance reasons.
+The inline parser skips pieces of texts to optimize speed. It stops only on [a small set of chars](https://github.com/markdown-it/markdown-it/blob/master/lib/rules_inline/text.js), which can be tokens. We did not made this list extensible for performance reasons too.
 
 If you are absolutely sure that something important is missing there - create a
-ticket and we will consider adding new charcodes.
+ticket and we will consider adding it as a new charcode.
 
 
 #### Why do you reject some useful things?
 
-We do a  markdown parser. It should keep "markdown spirit". Other things should
+We do a markdown parser. It should keep the "markdown spirit". Other things should
-be kept separate (in plugins, for example). We have no clear criteria, sorry.
+be kept separate, in plugins, for example. We have no clear criteria, sorry.
-Probably, you will find [CommonMark forum](http://talk.commonmark.org/) useful to read to understand us better.
+Probably, you will find [CommonMark forum](http://talk.commonmark.org/) a useful read to understand us better.
 
-Of cause, if you find architecture of this parser interesting for another type
+Of course, if you find the architecture of this parser interesting for another type
-of markup - you are welcome to reuse it in another project.
+of markup, you are welcome to reuse it in another project.