[MLIR][WASM] NFC: fix typo and documentation

Author: Luc Forget

mlir/include/mlir/Target/Wasm/WasmImporter.h

@@ -21,12 +21,9 @@
 
 namespace mlir::wasm {
 
-/// Translates the given operation to C++ code. The operation or operations in
-/// the region of 'op' need almost all be in EmitC dialect. The parameter
-/// 'declareVariablesAtTop' enforces that all variables for op results and block
-/// arguments are declared at the beginning of the function.
-/// If parameter 'fileId' is non-empty, then body of `emitc.file` ops
-/// with matching id are emitted.
+/// If `source` contains a valid Wasm binary file, this function returns a
+/// a ModuleOp containing the representation of trhe Wasm module encoded in
+/// the source file in the `wasmssa` dialect.
 OwningOpRef<ModuleOp> importWebAssemblyToModule(llvm::SourceMgr &source,
                                                 MLIRContext *context);
 } // namespace mlir::wasm

mlir/lib/Target/Wasm/TranslateFromWasm.cpp

@@ -319,7 +319,7 @@ class ParserHead {
     LDBG() << "  Current offset: " << offset;
     if (nBytes > size())
       return emitError(getLocation(), "trying to extract ")
-             << nBytes << "bytes when only " << size() << "are avilables";
+             << nBytes << "bytes when only " << size() << "are available";
 
     StringRef res = head.slice(offset, offset + nBytes);
     offset += nBytes;