[Issue 19364] Decrease template bloat for string functions

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19364

--- Comment #1 from github-bugzilla at puremagic.com ---
Commit pushed to master at https://github.com/dlang/phobos

https://github.com/dlang/phobos/commit/4cc47e6dc21ac3f42cd1b21f8dd37d2c56c070fa
Fix Issue 19364 - Decrease template bloat for string functions

Use const(E)[] instead of E[] when it is valid and doesn't change the
return type.

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