Documentation improvements (scrapy#6429)

Author: mlmsmith

Diff for: docs/intro/install.rst

@@ -37,7 +37,7 @@ Note that sometimes this may require solving compilation issues for some Scrapy
 dependencies depending on your operating system, so be sure to check the
 :ref:`intro-install-platform-notes`.
 
-For more detailed and platform specifics instructions, as well as
+For more detailed and platform-specific instructions, as well as
 troubleshooting information, read on.
 
 
@@ -101,7 +101,7 @@ Windows
 -------
 
 Though it's possible to install Scrapy on Windows using pip, we recommend you
-to install `Anaconda`_ or `Miniconda`_ and use the package from the
+install `Anaconda`_ or `Miniconda`_ and use the package from the
 `conda-forge`_ channel, which will avoid most installation issues.
 
 Once you've installed `Anaconda`_ or `Miniconda`_, install Scrapy with::
@@ -141,7 +141,7 @@ But it should support older versions of Ubuntu too, like Ubuntu 14.04,
 albeit with potential issues with TLS connections.
 
 **Don't** use the ``python-scrapy`` package provided by Ubuntu, they are
-typically too old and slow to catch up with latest Scrapy.
+typically too old and slow to catch up with the latest Scrapy release.
 
 
 To install Scrapy on Ubuntu (or Ubuntu-based) systems, you need to install
@@ -170,7 +170,7 @@ macOS
 
 Building Scrapy's dependencies requires the presence of a C compiler and
 development headers. On macOS this is typically provided by Apple’s Xcode
-development tools. To install the Xcode command line tools open a terminal
+development tools. To install the Xcode command-line tools, open a terminal
 window and run::
 
     xcode-select --install
@@ -200,11 +200,6 @@ solutions:
 
       brew install python
 
-  * Latest versions of python have ``pip`` bundled with them so you won't need
-    to install it separately. If this is not the case, upgrade python::
-
-      brew update; brew upgrade python
-
 *   *(Optional)* :ref:`Install Scrapy inside a Python virtual environment
     <intro-using-virtualenv>`.
 

Diff for: docs/intro/overview.rst

@@ -65,7 +65,7 @@ When you ran the command ``scrapy runspider quotes_spider.py``, Scrapy looked fo
 Spider definition inside it and ran it through its crawler engine.
 
 The crawl started by making requests to the URLs defined in the ``start_urls``
-attribute (in this case, only the URL for quotes in *humor* category)
+attribute (in this case, only the URL for quotes in the *humor* category)
 and called the default callback method ``parse``, passing the response object as
 an argument. In the ``parse`` callback, we loop through the quote elements
 using a CSS Selector, yield a Python dict with the extracted quote text and author,
@@ -83,9 +83,9 @@ While this enables you to do very fast crawls (sending multiple concurrent
 requests at the same time, in a fault-tolerant way) Scrapy also gives you
 control over the politeness of the crawl through :ref:`a few settings
 <topics-settings-ref>`. You can do things like setting a download delay between
-each request, limiting amount of concurrent requests per domain or per IP, and
+each request, limiting the amount of concurrent requests per domain or per IP, and
 even :ref:`using an auto-throttling extension <topics-autothrottle>` that tries
-to figure out these automatically.
+to figure these settings out automatically.
 
 .. note::
 
@@ -106,10 +106,10 @@ scraping easy and efficient, such as:
 
 * Built-in support for :ref:`selecting and extracting <topics-selectors>` data
   from HTML/XML sources using extended CSS selectors and XPath expressions,
-  with helper methods to extract using regular expressions.
+  with helper methods for extraction using regular expressions.
 
 * An :ref:`interactive shell console <topics-shell>` (IPython aware) for trying
-  out the CSS and XPath expressions to scrape data, very useful when writing or
+  out the CSS and XPath expressions to scrape data, which is very useful when writing or
   debugging your spiders.
 
 * Built-in support for :ref:`generating feed exports <topics-feed-exports>` in
@@ -124,7 +124,7 @@ scraping easy and efficient, such as:
   well-defined API (middlewares, :ref:`extensions <topics-extensions>`, and
   :ref:`pipelines <topics-item-pipeline>`).
 
-* Wide range of built-in extensions and middlewares for handling:
+* A wide range of built-in extensions and middlewares for handling:
 
   - cookies and session handling
   - HTTP features like compression, authentication, caching