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add comments back (#20256)

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My bad, I shouldn't have removed it in the precedent PR.
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ringabout 2022-08-22 10:45:30 +08:00 • committed by GitHub
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lib/system.nim
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@ -1078,6 +1078,9 @@ proc `&`*(x: char, y: string): string {.
## ##
## .. code-block:: Nim ## .. code-block:: Nim
## assert('a' & "bc" == "abc") ## assert('a' & "bc" == "abc")
# implementation note: These must all have the same magic value "ConStrStr" so
# that the merge optimization works properly.
proc add*(x: var string, y: char) {.magic: "AppendStrCh", noSideEffect.} proc add*(x: var string, y: char) {.magic: "AppendStrCh", noSideEffect.}
## Appends `y` to `x` in place. ## Appends `y` to `x` in place.