change 'iff' to 'if' to stop "corrections" once and for all (#14182)

lib/pure/collections/critbits.nim

@@ -54,7 +54,7 @@ proc rawGet[T](c: CritBitTree[T], key: string): Node[T] =
       return if it.key == key: it else: nil
 
 proc contains*[T](c: CritBitTree[T], key: string): bool {.inline.} =
-  ## Returns true iff `c` contains the given `key`.
+  ## Returns true if `c` contains the given `key`.
   runnableExamples:
     var c: CritBitTree[void]
     incl(c, "key")
@@ -156,7 +156,7 @@ proc excl*[T](c: var CritBitTree[T], key: string) =
   discard exclImpl(c, key)
 
 proc missingOrExcl*[T](c: var CritBitTree[T], key: string): bool =
-  ## Returns true iff `c` does not contain the given `key`. If the key
+  ## Returns true if `c` does not contain the given `key`. If the key
   ## does exist, c.excl(key) is performed.
   ##
   ## See also:
@@ -178,7 +178,7 @@ proc missingOrExcl*[T](c: var CritBitTree[T], key: string): bool =
   result = c.count == oldCount
 
 proc containsOrIncl*[T](c: var CritBitTree[T], key: string, val: T): bool =
-  ## Returns true iff `c` contains the given `key`. If the key does not exist
+  ## Returns true if `c` contains the given `key`. If the key does not exist
   ## ``c[key] = val`` is performed.
   ##
   ## See also:
@@ -204,7 +204,7 @@ proc containsOrIncl*[T](c: var CritBitTree[T], key: string, val: T): bool =
     if not result: n.val = val
 
 proc containsOrIncl*(c: var CritBitTree[void], key: string): bool =
-  ## Returns true iff `c` contains the given `key`. If the key does not exist
+  ## Returns true if `c` contains the given `key`. If the key does not exist
   ## it is inserted into `c`.
   ##
   ## See also:

lib/pure/collections/sharedtables.nim

@@ -134,7 +134,7 @@ proc mgetOrPut*[A, B](t: var SharedTable[A, B], key: A, val: B): var B =
     mgetOrPutImpl(enlarge)
 
 proc hasKeyOrPut*[A, B](t: var SharedTable[A, B], key: A, val: B): bool =
-  ## returns true iff `key` is in the table, otherwise inserts `value`.
+  ## returns true if `key` is in the table, otherwise inserts `value`.
   withLock t:
     hasKeyOrPutImpl(enlarge)
 

lib/pure/cstrutils.nim

@@ -31,7 +31,7 @@ when defined(js):
 else:
   proc startsWith*(s, prefix: cstring): bool {.noSideEffect,
     rtl, extern: "csuStartsWith".} =
-    ## Returns true iff ``s`` starts with ``prefix``.
+    ## Returns true if ``s`` starts with ``prefix``.
     ##
     ## If ``prefix == ""`` true is returned.
     ## 
@@ -44,7 +44,7 @@ else:
 
   proc endsWith*(s, suffix: cstring): bool {.noSideEffect,
     rtl, extern: "csuEndsWith".} =
-    ## Returns true iff ``s`` ends with ``suffix``.
+    ## Returns true if ``s`` ends with ``suffix``.
     ##
     ## If ``suffix == ""`` true is returned.
     ## 
@@ -64,9 +64,9 @@ proc cmpIgnoreStyle*(a, b: cstring): int {.noSideEffect,
   ## NOT be used to compare Nim identifier names. use `macros.eqIdent`
   ## for that.  Returns:
   ##
-  ## | 0 iff a == b
-  ## | < 0 iff a < b
-  ## | > 0 iff a > b
+  ## | 0 if a == b
+  ## | < 0 if a < b
+  ## | > 0 if a > b
   ## 
   ## Not supported for JS backend, use `strutils.cmpIgnoreStyle
   ## <https://nim-lang.org/docs/strutils.html#cmpIgnoreStyle%2Cstring%2Cstring>`_ instead.
@@ -86,9 +86,9 @@ proc cmpIgnoreCase*(a, b: cstring): int {.noSideEffect,
   rtl, extern: "csuCmpIgnoreCase".} =
   ## Compares two strings in a case insensitive manner. Returns:
   ##
-  ## | 0 iff a == b
-  ## | < 0 iff a < b
-  ## | > 0 iff a > b
+  ## | 0 if a == b
+  ## | < 0 if a < b
+  ## | > 0 if a > b
   ## 
   ## Not supported for JS backend, use `strutils.cmpIgnoreCase
   ## <https://nim-lang.org/docs/strutils.html#cmpIgnoreCase%2Cstring%2Cstring>`_ instead.

lib/pure/os.nim

@@ -797,9 +797,9 @@ proc cmpPaths*(pathA, pathB: string): int {.
   ## On a case-sensitive filesystem this is done
   ## case-sensitively otherwise case-insensitively. Returns:
   ##
-  ## | 0 iff pathA == pathB
-  ## | < 0 iff pathA < pathB
-  ## | > 0 iff pathA > pathB
+  ## | 0 if pathA == pathB
+  ## | < 0 if pathA < pathB
+  ## | > 0 if pathA > pathB
   runnableExamples:
     when defined(macosx):
       assert cmpPaths("foo", "Foo") == 0
@@ -1108,7 +1108,7 @@ proc existsFile*(filename: string): bool {.rtl, extern: "nos$1",
 
 proc existsDir*(dir: string): bool {.rtl, extern: "nos$1", tags: [ReadDirEffect],
                                      noNimScript.} =
-  ## Returns true iff the directory `dir` exists. If `dir` is a file, false
+  ## Returns true if the directory `dir` exists. If `dir` is a file, false
   ## is returned. Follows symlinks.
   ##
   ## See also:
@@ -1128,7 +1128,7 @@ proc existsDir*(dir: string): bool {.rtl, extern: "nos$1", tags: [ReadDirEffect]
 proc symlinkExists*(link: string): bool {.rtl, extern: "nos$1",
                                           tags: [ReadDirEffect],
                                           noNimScript.} =
-  ## Returns true iff the symlink `link` exists. Will return true
+  ## Returns true if the symlink `link` exists. Will return true
   ## regardless of whether the link points to a directory or file.
   ##
   ## See also:

lib/pure/osproc.nim

@@ -199,7 +199,7 @@ proc kill*(p: Process) {.rtl, extern: "nosp$1", tags: [].}
   ## * `terminate proc <#terminate,Process>`_
 
 proc running*(p: Process): bool {.rtl, extern: "nosp$1", tags: [].}
-  ## Returns true iff the process `p` is still running. Returns immediately.
+  ## Returns true if the process `p` is still running. Returns immediately.
 
 proc processID*(p: Process): int {.rtl, extern: "nosp$1".} =
   ## Returns `p`'s process ID.

lib/pure/typetraits.nim

@@ -59,7 +59,7 @@ proc stripGenericParams*(t: typedesc): typedesc {.magic: "TypeTrait".}
   ## them unmodified.
 
 proc supportsCopyMem*(t: typedesc): bool {.magic: "TypeTrait".}
-  ## This trait returns true iff the type ``t`` is safe to use for
+  ## This trait returns true if the type ``t`` is safe to use for
   ## `copyMem`:idx:.
   ##
   ## Other languages name a type like these `blob`:idx:.