Fix some typos in the MLIR documentation.

Summary: Fix minor typos in the tutorial and the "writing a pass" page.

Differential Revision: https://reviews.llvm.org/D74905

mlir/docs/Tutorials/Toy/Ch-4.md

@@ -315,7 +315,7 @@ void MulOp::inferShapes() { getResult().setType(getOperand(0).getType()); }
 
 At this point, each of the necessary Toy operations provide a mechanism by which
 to infer their output shapes. The ShapeInferencePass is a FunctionPass: it will
-runs on each Function in isolation. MLIR also supports general
+run on each Function in isolation. MLIR also supports general
 [OperationPasses](../../WritingAPass.md#operation-pass) that run on any isolated
 operation (i.e. other function-like operations), but here our module only
 contains functions, so there is no need to generalize to all operations.

mlir/docs/Tutorials/Toy/Ch-5.md

@@ -39,7 +39,7 @@ framework, we need to provide two things (and an optional third):
 *   A set of
     [Rewrite Patterns](../../DialectConversion.md#rewrite-pattern-specification)
 
-    -   These are the set of [patterns](../../QuickstartRewrites.md) used to
+    -   This is the set of [patterns](../../QuickstartRewrites.md) used to
         convert `illegal` operations into a set of zero or more `legal` ones.
 
 *   Optionally, a [Type Converter](../../DialectConversion.md#type-conversion).

mlir/docs/Tutorials/Toy/Ch-6.md

@@ -275,7 +275,7 @@ int dumpLLVMIR(mlir::ModuleOp module) {
 Setting up a JIT to run the module containing the LLVM dialect can be done using
 the `mlir::ExecutionEngine` infrastructure. This is a utility wrapper around
 LLVM's JIT that accepts `.mlir` as input. The full code listing for setting up
-the JIT can be found in `Ch6/toy.cpp` in the `runJit()` function:
+the JIT can be found in `Ch6/toyc.cpp` in the `runJit()` function:
 
 ```c++
 int runJit(mlir::ModuleOp module) {

mlir/docs/WritingAPass.md

@@ -127,7 +127,7 @@ invalidated) based upon other properties such as analyses sets.
 
 ### Querying Analyses
 
-The base `OperationPass` class provide utilities for querying and preserving
+The base `OperationPass` class provides utilities for querying and preserving
 analyses for the current operation being processed.
 
 *   OperationPass automatically provides the following utilities for querying