explain in message how to silence timetrap warning

src/commands/display.rs

@@ -170,7 +170,7 @@ mod tests {
 
         assert_eq!(
             String::from_utf8_lossy(&streams.err),
-            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate\n"
+            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n"
         );
     }
 
@@ -317,7 +317,7 @@ Timesheet: sheet1
 
         assert_eq!(
             String::from_utf8_lossy(&streams.err),
-            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate\n"
+            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n"
         );
     }
 

src/commands/edit.rs

@@ -365,7 +365,7 @@ mod tests {
 ");
         assert_eq!(
             String::from_utf8_lossy(&streams.err),
-            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate\n"
+            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n"
         );
 
         std::mem::drop(streams.db);

src/commands/in.rs

@@ -177,7 +177,7 @@ mod tests {
         assert_eq!(&String::from_utf8_lossy(&streams.out), "Checked into sheet \"default\".\n");
         assert_eq!(&String::from_utf8_lossy(&streams.err),
             "[WARNING] You are using the old timetrap format, it is advised that \
-            you update your database using t migrate\n");
+            you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n");
     }
 
     #[test]

src/commands/list.rs

@@ -232,7 +232,7 @@ mod tests {
 
         assert_eq!(
             String::from_utf8_lossy(&streams.err),
-            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate\n"
+            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n"
         );
     }
 }

src/commands/now.rs

@@ -135,7 +135,7 @@ mod tests {
 
         assert_eq!(
             String::from_utf8_lossy(&streams.err),
-            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate\n"
+            "[WARNING] You are using the old timetrap format, it is advised that you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n"
         );
     }
 }

src/commands/out.rs

@@ -114,6 +114,6 @@ mod tests {
         assert_eq!(&String::from_utf8_lossy(&streams.out), "Checked out of sheet \"default\".\n");
         assert_eq!(&String::from_utf8_lossy(&streams.err),
             "[WARNING] You are using the old timetrap format, it is advised that \
-            you update your database using t migrate\n");
+            you update your database using t migrate. To supress this warning set TIEMPO_SUPRESS_TIMETRAP_WARNING=1\n");
     }
 }