Rename = to =copy in stdlib (#17781)

lib/deprecated/pure/sharedstrings.nim

@@ -37,7 +37,7 @@ proc `=destroy`*(s: SharedString) =
     decRef(s.buffer)
 
 when false:
-  proc `=`*(dest: var SharedString; src: SharedString) =
+  proc `=copy`*(dest: var SharedString; src: SharedString) =
     incRef(src.buffer)
     if not dest.buffer.isNil:
       decRef(dest.buffer)

lib/std/channels.nim

@@ -443,7 +443,7 @@ proc `=destroy`*[T](c: var Channel[T]) =
     else:
       atomicDec(c.d.atomicCounter)
 
-proc `=`*[T](dest: var Channel[T], src: Channel[T]) =
+proc `=copy`*[T](dest: var Channel[T], src: Channel[T]) =
   ## Shares `Channel` by reference counting.
   if src.d != nil:
     atomicInc(src.d.atomicCounter)

lib/std/isolation.nim

@@ -18,7 +18,7 @@ type
   Isolated*[T] = object ## Isolated data can only be moved, not copied.
     value: T
 
-proc `=`*[T](dest: var Isolated[T]; src: Isolated[T]) {.error.}
+proc `=copy`*[T](dest: var Isolated[T]; src: Isolated[T]) {.error.}
 
 proc `=sink`*[T](dest: var Isolated[T]; src: Isolated[T]) {.inline.} =
   # delegate to value's sink operation

lib/system.nim

@@ -478,6 +478,7 @@ proc `[]`*[I: Ordinal;T](a: T; i: I): T {.
 proc `[]=`*[I: Ordinal;T,S](a: T; i: I;
   x: sink S) {.noSideEffect, magic: "ArrPut".}
 proc `=`*[T](dest: var T; src: T) {.noSideEffect, magic: "Asgn".}
+proc `=copy`*[T](dest: var T; src: T) {.noSideEffect, magic: "Asgn".}
 
 proc arrGet[I: Ordinal;T](a: T; i: I): T {.
   noSideEffect, magic: "ArrGet".}

lib/system/widestrs.nim

@@ -32,7 +32,7 @@ when defined(nimv2):
       else:
         dealloc(a.data)
 
-  proc `=`(a: var WideCStringObj; b: WideCStringObj) {.error.}
+  proc `=copy`(a: var WideCStringObj; b: WideCStringObj) {.error.}
 
   proc `=sink`(a: var WideCStringObj; b: WideCStringObj) =
     a.bytes = b.bytes