[prql] fix double quoted string highlighting

src/internals/sql-ref.rst

@@ -4634,20 +4634,11 @@ from *table*
 
     .. code-block::  custsqlite
 
-      ;from db.http_status_codes | take 3
-      ✘ error: failed to compile SQL statement
-       reason: no such table: db.http_status_codes
-       --> command:1
-       | SELECT                                                                                
-       |   *                                                                                   
-       | FROM                                                                                  
-       |   db.http_status_codes                                                                
-       | LIMIT                                                                                 
-       |   3                                                                                   
-       |                                                                                       
-       | -- Generated by PRQL compiler version:0.11.5 target:sql.sqlite (https://prql-lang.org)
-       |                                                                                       
-      
+      ;from http_status_codes | take 3
+      status     message     
+         100 Continue        
+         101 Switchi⋯otocols 
+         102 Processing      
 
     To use an array literal as a source:
 

src/readline_highlighters.cc

@@ -280,9 +280,7 @@ readline_sqlite_highlighter_int(attr_line_t& al, int x, line_range sub)
                    || attr.sa_type == &lnav::sql::PRQL_NUMBER_ATTR)
         {
             alb.overlay_attr(lr, VC_ROLE.value(role_t::VCR_NUMBER));
-        } else if (attr.sa_type == &SQL_STRING_ATTR
-                   || attr.sa_type == &lnav::sql::PRQL_STRING_ATTR)
-        {
+        } else if (attr.sa_type == &SQL_STRING_ATTR) {
             if (lr.length() > 1 && al.al_string[lr.lr_end - 1] == '\'') {
                 alb.overlay_attr(lr, VC_ROLE.value(role_t::VCR_STRING));
             } else {
@@ -291,6 +289,8 @@ readline_sqlite_highlighter_int(attr_line_t& al, int x, line_range sub)
                 alb.overlay_attr_for_char(lr.lr_start,
                                           VC_ROLE.value(role_t::VCR_ERROR));
             }
+        } else if (attr.sa_type == &lnav::sql::PRQL_STRING_ATTR) {
+            alb.overlay_attr(lr, VC_ROLE.value(role_t::VCR_STRING));
         } else if (attr.sa_type == &SQL_OPERATOR_ATTR
                    || attr.sa_type == &lnav::sql::PRQL_OPERATOR_ATTR)
         {

src/sql_commands.cc

@@ -485,7 +485,7 @@ static readline_context::command_t sql_commands[] = {
             .with_parameter({"table", "The table to use as a source"})
             .with_example({
                 "To pull data from the 'http_status_codes' database table",
-                "from db.http_status_codes | take 3",
+                "from http_status_codes | take 3",
                 help_example::language::prql,
             })
             .with_example({

src/sql_util.cc

@@ -1397,7 +1397,7 @@ annotate_prql_statement(attr_line_t& al)
             &PRQL_STRING_ATTR,
         },
         {
-            lnav::pcre2pp::code::from_const(R"(\A(?:f|r|s)?\"([^\"]|\\.)*\")"),
+            lnav::pcre2pp::code::from_const(R"(\A(?:f|r|s)?"([^\"]|\\.)*")"),
             &PRQL_STRING_ATTR,
         },
         {