proc: fix comment typos (#3531)

Author: alexandear

pkg/proc/evalop/evalcompile.go

@@ -88,7 +88,7 @@ func (ctx *compileCtx) pushOp(op Op) {
 }
 
 // depthCheck validates the list of instructions produced by Compile and
-// CompileSet by peforming a stack depth check.
+// CompileSet by performing a stack depth check.
 // It calculates the depth of the stack at every instruction in ctx.ops and
 // checks that they have enough arguments to execute. For instructions that
 // can be reached through multiple paths (because of a jump) it checks that

pkg/proc/evalop/ops.go

@@ -133,7 +133,7 @@ type Index struct {
 
 func (*Index) depthCheck() (npop, npush int) { return 2, 1 }
 
-// Jump looks at the topmost stack variable and if it satisifies the
+// Jump looks at the topmost stack variable and if it satisfies the
 // condition specified by When it jumps to the stack machine instruction at
 // Target+1.
 // If Pop is set the topmost stack variable is also popped.