Fix typo

afer -> after
parellelism -> parallelism

Author: kentya6

Diff for: docs/DebuggingTheCompiler.rst

@@ -43,7 +43,7 @@ Here is how to dump the IR after the main phases of the swift compiler
 
     swiftc -emit-ir -Xfrontend -disable-llvm-optzns -O file.swift
 
-4. **LLVM passes**. To print the LLVM IR afer LLVM passes::
+4. **LLVM passes**. To print the LLVM IR after LLVM passes::
 
     swiftc -emit-ir -O file.swift
 

Diff for: docs/DriverInternals.rst

@@ -114,7 +114,7 @@ Analysis` for more information.
 The Compilation's TaskQueue controls the low-level aspects of managing
 subprocesses. Multiple Jobs may execute simultaneously, but communication with
 the parent process (the driver) is handled on a single thread. The level of
-parellelism may be controlled by a compiler flag.
+parallelism may be controlled by a compiler flag.
 
 If a Job does not finish successfully, the Compilation needs to record which
 jobs have failed, so that they get rebuilt next time the user tries to build