diff --git a/src/parser/grammar.pg b/src/parser/grammar.pg
index c17c80e..3b5fcc6 100644
--- a/src/parser/grammar.pg
+++ b/src/parser/grammar.pg
@@ -190,8 +190,6 @@ rule args {
 
 rule 'arg' is optable { ... }
 
-proto 'infix:=' is precedence('1') is pasttype('copy') is lvalue(1)     { ... }
-
 token basic_primary {
     | <literal> {*}                         #= literal
     | <funcall> {*}                         #= funcall
@@ -488,10 +486,10 @@ proto 'infix:&=' is equiv('infix:=')    { ... }
 
 proto 'infix:~=' is equiv('infix:=')    { ... }
 
-proto infix:«>>=» is equiv('infix:=')
+proto 'infix:>>=' is equiv('infix:=')
                   is pirop('shr')       { ... }
 
-proto infix:«<<=» is equiv('infix:=')
+proto 'infix:<<=' is equiv('infix:=')
                   is pirop('shl')       { ... }
 
 proto 'infix:&&=' is equiv('infix:=')
@@ -521,23 +519,23 @@ proto 'infix:!='      is equiv('infix:==') { ... }
 proto 'infix:=~'      is equiv('infix:==') { ... }
 proto 'infix:!~'      is equiv('infix:==') { ... }
 proto 'infix:==='     is equiv('infix:==') { ... }
-proto infix:«<=>» is equiv('infix:==') { ... }
+proto 'infix:<=>'     is equiv('infix:==') { ... }
 
 
-proto infix:«>»  is tighter('infix:===') { ... }
-proto infix:«<»  is tighter('infix:===') { ... }
-proto infix:«<=»  is tighter('infix:===') { ... }
-proto infix:«>=» is tighter('infix:===') { ... }
+proto 'infix:>'  is tighter('infix:===') { ... }
+proto 'infix:<'  is equiv('infix:>') { ... }
+proto 'infix:<=' is equiv('infix:>') { ... }
+proto 'infix:>=' is equiv('infix:>') { ... }
 
 proto 'infix:|' is tighter('infix:<=')  { ... }
 proto 'infix:^' is equiv('infix:|')  { ... }
 
 proto 'infix:&' is tighter('infix:|')  { ... }
 
-proto infix:«<<»  is tighter('infix:&') { ... }
-proto infix:«>>»  is equiv(infix:«<<») { ... }
+proto 'infix:<<'  is tighter('infix:&') { ... }
+proto 'infix:>>'  is equiv('infix:<<') { ... }
 
-proto 'infix:+' is tighter(infix:«<<»)  { ... }
+proto 'infix:+' is tighter('infix:<<')  { ... }
 
 proto 'infix:-' is equiv('infix:+') { ... }
                 #is pirop('sub')       { ... }