chore: fix some comments (sqlc-dev#3278)

Signed-off-by: sunxunle <sunxunle@gmail.com>

Author: sunxunle

internal/analyzer/analyzer.go

@@ -48,7 +48,7 @@ func (c *CachedAnalyzer) Analyze(ctx context.Context, n ast.Node, q string, sche
 }
 
 func (c *CachedAnalyzer) analyze(ctx context.Context, n ast.Node, q string, schema []string, np *named.ParamSet) (*analysis.Analysis, bool, error) {
-	// Only cache queries for managed databases. We can't be certain the the
+	// Only cache queries for managed databases. We can't be certain the
 	// database is in an unchanged state otherwise
 	if !c.db.Managed {
 		return nil, true, nil

internal/engine/postgresql/parse.go

@@ -271,7 +271,7 @@ func translate(node *nodes.Node) (ast.Node, error) {
 				case nodes.AlterTableType_AT_AddColumn:
 					d, ok := altercmd.Def.Node.(*nodes.Node_ColumnDef)
 					if !ok {
-						return nil, fmt.Errorf("expected alter table defintion to be a ColumnDef")
+						return nil, fmt.Errorf("expected alter table definition to be a ColumnDef")
 					}
 
 					rel, err := parseRelationFromNodes(d.ColumnDef.TypeName.Names)
@@ -290,7 +290,7 @@ func translate(node *nodes.Node) (ast.Node, error) {
 				case nodes.AlterTableType_AT_AlterColumnType:
 					d, ok := altercmd.Def.Node.(*nodes.Node_ColumnDef)
 					if !ok {
-						return nil, fmt.Errorf("expected alter table defintion to be a ColumnDef")
+						return nil, fmt.Errorf("expected alter table definition to be a ColumnDef")
 					}
 					col := ""
 					if altercmd.Name != "" {