Fix some guidelines violations and typos

[valzevul]

Fix a couple of typos and update whitespaces to look more general.

[lattner]

This patch looks fine to me, Jordan do you have a specific concern?

[jrose-apple]

Yes, see the comment on the second commit.

(I have no problem with this if the test passes, just wanted to make sure @valzevul did check that.)

[gribozavr]

I'll run tests and merge.

[gribozavr]

The tests broke:

<src>/swift/test/SILGen/coverage_member_closure.swift:6:16: warning: will never be executed
    if (false) { // CHECK: [[@LINE]]:16 -> [[@LINE+2]]:6 : 1
               ^
<src>/swift/test/SILGen/coverage_member_closure.swift:6:8: note: condition always evaluates to false
    if (false) { // CHECK: [[@LINE]]:16 -> [[@LINE+2]]:6 : 1
       ^
<src>/swift/test/SILGen/coverage_member_closure.swift:13:12: error: expected string not found in input
 // CHECK: [[@LINE+1]]:55 -> [[@LINE+1]]:77 : 2

@valzevul Please run utils/build-script -RT and update the pull request.

[frootloops]

@valzevul @gribozavr @jrose-apple it's already merged #610 you can close this PR