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+### What it does
+Warns about calling `str::trim` (or variants) before `str::split_whitespace`.
+
+### Why is this bad?
+`split_whitespace` already ignores leading and trailing whitespace.
+
+### Example
+```
+" A B C ".trim().split_whitespace();
+```
+Use instead:
+```
+" A B C ".split_whitespace();
+``` \ No newline at end of file