Auto merge of #6099 - bundler:colby/docs-ascii, r=segiddins
Auto merge of #6099 - bundler:colby/docs-ascii, r=segiddins

remove non-ascii chars from binstubs man page

### What was the end-user problem that led to this PR?

There are some non-ascii characters in `man/bundle-binstubs.ronn` that is causing a build failure when `ronn` is compiling the man pages on linux

```
...
/usr/local/bin/ruby -S ronn --roff --pipe man/bundle-binstubs.ronn > man/bundle-binstubs.1
/usr/local/bundle/gems/ronn-0.7.3/lib/ronn/document.rb:192:in `split': invalid byte sequence in US-ASCII (ArgumentError)
	from /usr/local/bundle/gems/ronn-0.7.3/lib/ronn/document.rb:192:in `sniff'
	from /usr/local/bundle/gems/ronn-0.7.3/lib/ronn/document.rb:76:in `initialize'
	from /usr/local/bundle/gems/ronn-0.7.3/bin/ronn:166:in `new'
	from /usr/local/bundle/gems/ronn-0.7.3/bin/ronn:166:in `block in <top (required)>'
	from /usr/local/bundle/gems/ronn-0.7.3/bin/ronn:166:in `map'
	from /usr/local/bundle/gems/ronn-0.7.3/bin/ronn:166:in `<top (required)>'
	from /usr/local/bundle/bin/ronn:23:in `load'
	from /usr/local/bundle/bin/ronn:23:in `<main>'
rake aborted!
Command failed with status (1): [/usr/local/bin/ruby -S ronn --roff --pipe ...]
/opt/bundler/Rakefile:275:in `block (3 levels) in <top (required)>'
/opt/bundler/Rakefile:32:in `block in invoke'
/opt/bundler/Rakefile:31:in `invoke'
Tasks: TOP => man:build => man:build_all_pages => man/bundle-binstubs.1.txt => man/bundle-binstubs.1
(See full trace by running task with --trace)
/opt/bundler/spec/support/manpages.rb:11:in `setup': Failed building man pages (RuntimeError)
	from /opt/bundler/spec/spec_helper.rb:47:in `<top (required)>'
	from /usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /usr/local/lib/ruby/2.4.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /usr/local/bundle/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:1453:in `block in requires='
	from /usr/local/bundle/gems/rspec-core-3.6.0/lib/rspec/core/configuration.rb:1453:in `each'
```

### What is your fix for the problem, implemented in this PR?

Replace characters with their ascii equivalent

(cherry picked from commit 69ca440c3a122b65e95dbcc203383ee835158e1c)

mvz/bundler,bundler/bundler,mvz/bundler,bundler/bundler,dilumnavanjana/bundler,dilumnavanjana/bundler