Minor fixes

[phcorp]

Q	A
Branch?	master
Bug fix?	yes
New feature?	no
BC breaks?	no
Deprecations?	no
Tests pass?	yes
Fixed tickets	none
License	MIT
Doc PR	none

two minor fixes:

• filenames should be escaped in shell as they may contain invalid characters (i.e space, parenthesis)
• a class filename did not match class name case, could be a problem on case-sensitive systems (maybe not Windows/OS X)

PHPUnit 5.5.4 by Sebastian Bergmann and contributors.

...............................................................  63 / 123 ( 51%)
.S.................................................SSSSSSSSS    123 / 123 (100%)

Time: 41.48 seconds, Memory: 247.00MB

OK, but incomplete, skipped, or risky tests!
Tests: 123, Assertions: 733, Skipped: 10.