[docs] Copy-edit lld/docs/WebAssembly.rst

[siedentop]

Summary

Fixes small typos in WebAssembly documentation. I first noticed the sub-heading "Bahavior", and then decided to review the whole file.

[sbc100]

Great! Thank you.

lld/docs/WebAssembly.rst

13

How about The WebAssemby object file format used by LLVM and LLD is specified as ...

19

This last sentence is no longer true. WebAssembly is on the of he default targets now (Not part of this PR but something I just noticed).

[siedentop]

Thank you for the suggestion. Updated as suggested.

[siedentop]

Could someone please merge/commit this now? I do not have commit access. First contribution :)

lld/docs/WebAssembly.rst

 The WebAssembly version of lld takes WebAssembly binaries as inputs and produces
 a WebAssembly binary as its output.  For the most part it tries to mimic the
 behaviour of traditional ELF linkers and specifically the ELF lld port.  Where
-possible that command line flags and the semantics should be the same.
+possible the command line flags and the semantics should be the same.
 
 
 Object file format
 ------------------
 
-The format the input object files that lld expects is specified as part of the
+The WebAssembly object file format used by LLVM and LLD is specified as part of
 the WebAssembly tool conventions on linking_.
 
-This is object format that the llvm will produce when run with the
-``wasm32-unknown-unknown`` target.  To build llvm with WebAssembly support
-currently requires enabling the experimental backed using
-``-DLLVM_EXPERIMENTAL_TARGETS_TO_BUILD=WebAssembly``.
-
+This is the object format that the llvm will produce when run with the
+``wasm32-unknown-unknown`` target.
 
 Usage
 -----

 By default the function table is neither imported nor exported, but defined
 for internal use only.
 
-Bahaviour
+Behaviour
 ---------
 
 In general, where possible, the WebAssembly linker attempts to emulate the
-behavior of a traditional ELF linker, and in particular the ELF port of lld.
+behaviour of a traditional ELF linker, and in particular the ELF port of lld.
 For more specific details on how this is achieved see the tool conventions on
 linking_.
 
-Function Signatrues
+Function Signatures
 ~~~~~~~~~~~~~~~~~~~
 
 One way in which the WebAssembly linker differs from traditional native linkers
 is that function signature checking is strict in WebAssembly.  It is a
-validation error for a module to contain to call site that doesn't agree with
-the target signature.  Even though this is undefined behavior in C/C++ its not
-uncommon to find this in real world C/C++ programs.  For example, a call site in
-one complication unit which calls a function defined in another complication
+validation error for a module to contain a call site that doesn't agree with
+the target signature.  Even though this is undefined behaviour in C/C++, it is not
+uncommon to find this in real-world C/C++ programs.  For example, a call site in
+one compilation unit which calls a function defined in another compilation
 unit but with too many arguments.
 
-In order not to generate such invalid modules lld has two modes of handling such
-mismatches: it can simply error out or it can create stub functions that will
+In order not to generate such invalid modules, lld has two modes of handling such
+mismatches: it can simply error-out or it can create stub functions that will
 trap at runtime (functions that contain only an ``unreachable`` instruction)
 and use these stub functions at the otherwise invalid call sites.
 
-The the default befviour is to generate these stub function and to produce
+The default behaviour is to generate these stub function and to produce
 a warning.  The ``--falal-warnings`` flag can be used to disable this behaviour
 and error out if mismatched are found.