Update makefile.md

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Mehran Poursadeghi 2020-05-08 14:27:15 +04:30 committed by GitHub
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@ -11,6 +11,7 @@ category: CLI
uglify = $(uglify) # lazy assignment
compressor := $(uglify) # immediate assignment
prefix ?= /usr/local # safe assignment
hello += world # append
```
`=` expressions are only evaluated when they're being used.