Use spaces around optional parameter values #12510

Job	Run time
Install Rubygems on Windows (3.3)	3m 45s
Install Rubygems on Windows (jruby)	5m 23s
Handling issues with a shared gem home (system)	18s
Handling gems shipped by default with RVM (3.2, 3.2.9)	12s
Handling issues with a shared gem home (dev)	20s
Handling gems shipped by default with RVM (3.3, 3.3.9)	11s
Install Rubygems on Windows (3.4)	3m 56s
Install Rubygems on Ubuntu (3.2, openssl)	2m 6s
Install Rubygems on Ubuntu (jruby, openssl)	3m 39s
Install Rubygems on Windows (3.2)	3m 43s
Install Rubygems on Ubuntu (3.3, no-openssl)	1m 49s
Install Rubygems on Ubuntu (jruby, no-openssl)	3m 21s
Handling gems shipped by default with RVM (3.4, 3.4.5)	12s
Install Rubygems on Ubuntu (3.4, openssl)	2m 4s
Install Rubygems on Ubuntu (truffleruby, no-openssl)	3m 6s
Install Rubygems on Ubuntu (3.2, no-openssl)	1m 46s
Install Rubygems on Ubuntu (truffleruby, openssl)	3m 30s
Install Rubygems on Ubuntu (3.3, openssl)	2m 17s
Install Rubygems on Ubuntu (3.4, no-openssl)	1m 50s
All install-rubygems jobs pass	3s
	43m 31s

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