cmd/formulae.sh: fix spaces

[maxim-belkin]

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Fix two issues with spaces in the output of brew formulae. The space in front of a formula name is easy to visualize (see below), the other one is more subtle as it appears at the end of one formula name.

Before:

$ brew formulae | head -n 5
 xctool
a2ps
a52dec
aacgain
aalib

After:

$ brew formulae | head -n 5
a2ps
a52dec
aacgain
aalib
aamath

[BrewTestBot]

Review period ended.

[MikeMcQuaid]

Thanks @maxim-belkin!