book: typo fixes (changkun#240)

meisterluk · web-flow · commit 97b6cc75f7a0 · 2022-07-17T12:38:57.000+02:00
diff --git a/book/en-us/03-runtime.md b/book/en-us/03-runtime.md
@@ -339,7 +339,7 @@ void reference(std::string&& str) {
 int main()
 {
     std::string  lv1 = "string,";       // lv1 is a lvalue
-    // std::string&& r1 = s1;           // illegal, rvalue can't ref to lvalue
+    // std::string&& r1 = lv1;          // illegal, rvalue can't ref to lvalue
     std::string&& rv1 = std::move(lv1); // legal, std::move can convert lvalue to rvalue
     std::cout << rv1 << std::endl;      // string,
 

Original file line number	Diff line number	Diff line change
`@@ -339,7 +339,7 @@ void reference(std::string&& str) {`
`339`	`339`	`int main()`
`340`	`340`	`{`
`341`	`341`	`std::string lv1 = "string,"; // lv1 is a lvalue`
`342`		`- // std::string&& r1 = s1; // illegal, rvalue can't ref to lvalue`
	`342`	`+ // std::string&& r1 = lv1; // illegal, rvalue can't ref to lvalue`
`343`	`343`	`std::string&& rv1 = std::move(lv1); // legal, std::move can convert lvalue to rvalue`
`344`	`344`	`std::cout << rv1 << std::endl; // string,`
`345`	`345`