Minor fixes, and make one more regression test case deterministic

Author: hsutter

regression-tests/mixed-multiple-return-values.cpp2

@@ -8,7 +8,7 @@ f: () -> (i: int, s: std::string) = {
 
     i = 10;
 
-    if std::time(nullptr)%2 == 0 {
+    if std::rand()%2 == 0 {
         s = "xyzzy";
     }
     else {
@@ -18,7 +18,7 @@ f: () -> (i: int, s: std::string) = {
     return;
 }
 
-print: (name: std::string, value:_) 
+print: (name: std::string, value:_)
     = std::cout << name << " is " << value << "\n";
 
 int main() {

regression-tests/test-results/mixed-multiple-return-values.cpp

@@ -35,7 +35,7 @@ int main() {
 
     i.construct(10);
 
-    if (std::time(nullptr) % 2 == 0) {
+    if (std::rand() % 2 == 0) {
         s.construct("xyzzy");
     }
     else {

regression-tests/test-results/msvc-2022/mixed-multiple-return-values.cpp.execution

@@ -1,2 +1,2 @@
 a is 10
-b is xyzzy
+b is plugh

source/lex.h

@@ -449,7 +449,7 @@ auto lex_line(
                 !is_identifier_continue(line[i+m[0].length()])  // non-identifier char
                 )
             {
-                return (int)(m[0].length());;
+                return (int)(m[0].length());
             }
         }
         return 0;

source/sema.h

@@ -209,7 +209,7 @@ class sema
 public:
     std::vector<error>&          errors;
     std::vector<symbol>          symbols;
-    std::vector<declaration_sym> partial_decl_stack;;
+    std::vector<declaration_sym> partial_decl_stack;
 
     std::vector<selection_statement_node const*> active_selections;
 
@@ -544,7 +544,7 @@ class sema
                 if (sym.start && sym.identifier && *sym.identifier == *id) {
                     errors.emplace_back(
                         sym.identifier->position(),
-                        "local variable" + sym.identifier->to_string(true)
+                        "local variable " + sym.identifier->to_string(true)
                             + " cannot have the same name as an uninitialized"
                               " variable in the same function");
                 }