anchor.diff:  
   ## ENVIRONMENT
   
  -Note that environment variables must have a value set to be detected. For example, run
  -`export HOMEBREW_NO_INSECURE_REDIRECT=1` rather than just
  +Note that environment variables must have a value set to be detected. For
  +example, run `export HOMEBREW_NO_INSECURE_REDIRECT=1` rather than just
   `export HOMEBREW_NO_INSECURE_REDIRECT`.
   
   <%= environment_variables %>
  
positive.code: ## DESCRIPTION
  
  Homebrew is the easiest and most flexible way to install the UNIX tools Apple
  didn't include with macOS.
  
  ## ESSENTIAL COMMANDS
  
  For the full command list, see the [COMMANDS](#commands) section.
  
  With `--verbose` or `--debug`, many commands print extra debugging information. Note that
  these options should only appear after a command.
  
  ### `install` <formula>:
  
  Install <formula>.
  
  <formula> is usually the name of the formula to install, but it has other syntaxes which
  are listed in the [SPECIFYING FORMULAE](#specifying-formulae) section.
  
  ### `uninstall` <formula>:
  
  
negative.code: <%
  # To make changes to this man page:
  #
  # - For changes to a command under `COMMANDS` or `DEVELOPER COMMANDS` sections):
  #   - Find the source file in `Library/Homebrew/[dev-]cmd/<command>.{rb,sh}`.
  #   - For `.rb` files, edit the `<command>_args` method.
  #   - For `.sh` files, edit the top comment, being sure to use the line prefix
  #     `#:` for the comments to be recognized as documentation. If in doubt,
  #     compare with already documented commands.
  # - For global options: Edit `Library/Homebrew/cli/parser.rb`.
  # - For environment variables: Edit `Library/Homebrew/env_config.rb`.
  # - For other changes: Edit this file.
  #
  # When done, regenerate the man page and its HTML version by running `brew man`.
  %>
  brew(1) -- The Missing Package Manager for macOS (or Linux)
  ===========================================================
  
  ## SYNOPSIS
  
  