Fix major performance degradation from minimal indenting

[bitwiseman]

Before minimal indenting ( 68a8542 ), js-beautify had the following performance when run against jquery 2.0.2 ( http://code.jquery.com/jquery-2.0.2.js ):

----------------------------------------
Testing js-beautify cli performance...
beautified ../../../../../tmp/js-beautify-perf/jquery-2.0.2-output.js

real    0m0.238s
user    0m0.213s
sys 0m0.024s
----------------------------------------

After that commit the same command had the following results:

----------------------------------------
Testing js-beautify cli performance...
beautified ../../../../../tmp/js-beautify-perf/jquery-2.0.2-output.js

real    0m1.845s
user    0m1.821s
sys 0m0.030s
----------------------------------------

Admittedly, jquery 2.0.2 is a large file ( 237 Kb), but this is still pretty bad.

Use js/test/shell-perf-test.sh to measure results. Output will be machine specific, so baseline before making changes.

[bitwiseman]

After the fix:

----------------------------------------
Testing js-beautify cli performance...
beautified ../../../../../tmp/js-beautify-perf/jquery-2.0.2-output.js

real    0m0.256s
user    0m0.229s
sys 0m0.025s
----------------------------------------