fix several typos in documentation and comments (#12553)

tests/gc/gcbench.nim

@@ -44,7 +44,7 @@ discard """
 # - No way to check on memory use
 # - No cyclic data structures
 # - No attempt to measure variation with object size
-# - Results are sensitive to locking cost, but we dont
+# - Results are sensitive to locking cost, but we don't
 #   check for proper locking
 #
 

tests/manyloc/keineschweine/dependencies/genpacket/genpacket_enet.nim

@@ -114,7 +114,7 @@ macro defPacket*(typeNameN: untyped, typeFields: untyped): untyped =
         packBody.add(newCall("pack", streamID, dotName))
         readBody.add(resName := newCall("read" & $typeFields[i][1].ident, streamID))
     else:
-      error("I dont know what to do with: " & treerepr(typeFields[i]))
+      error("I don't know what to do with: " & treerepr(typeFields[i]))
 
   var
     toStringFunc = newNimNode(nnkProcDef).und(

tests/misc/tunsignedconv.nim

@@ -23,7 +23,7 @@ when false:
   var d32 = v8 + 10'i32
 
 when false:
-  # these dont work yet because unsigned.nim is stupid. XXX We need to fix this.
+  # these don't work yet because unsigned.nim is stupid. XXX We need to fix this.
   var f8  = v16 + 10'u8
   var f16 = v16 + 10'u16
   var f32 = v16 + 10'u32

tests/objvariant/tadrdisc.nim

@@ -3,7 +3,7 @@ discard """
   file: "tadrdisc.nim"
   line: 20
 """
-# Test that the address of a dicriminants cannot be taken
+# Test that the address of a discriminants cannot be taken
 
 type
   TKind = enum ka, kb, kc

tests/tuples/tuple_with_nil.nim

@@ -87,7 +87,7 @@ proc has(c: Captures; i: range[0..pegs.MaxSubpatterns-1]): bool {.nosideeffect,
   result = b.first <= b.last
 
 proc get(str: string; c: Captures; i: range[0..MaxSubpatterns-1]; def: char): char {.nosideeffect, inline.} =
-  ## If capture `i` is non-empty return that portion of `str` casted
+  ## If capture `i` is non-empty return that portion of `str` cast
   ## to `char`, otherwise return `def`.
   result = if c.has(i): str[c.bounds(i).first] else: def
 
@@ -344,7 +344,7 @@ proc writeformat(o: var Writer; p: pointer; fmt: Format) =
   ## Write pointer `i` according to format `fmt` using output object
   ## `o` and output function `add`.
   ##
-  ## Pointers are casted to unsigned int and formatted as hexadecimal
+  ## Pointers are cast to unsigned int and formatted as hexadecimal
   ## with prefix unless specified otherwise.
   var f = fmt
   if f.typ == 0.char: