Add missing / fix incorrect error docs

[Narretz]

• $parse:esc is an error that's apparently impossible to hit

  angular.js/src/ng/parse.js

  Line 457 in c35786a

  this.throwError('IMPOSSIBLE');

  @lgalfaso can we remove this error?
• $parse:lval needs docs

  angular.js/src/ng/parse.js

  Line 342 in c35786a

  throw $parseMinErr('lval', 'Trying to assign a value to a non l-value');

• $route:norout needs docs:

  angular.js/src/ngRoute/route.js

  Line 612 in c35786a

  throw $routeMinErr('norout', 'Tried updating route when with no current route');

• find out why tpload error has mixed up namespaces: Warn for missing / obsolete error docs #15844 (comment)

[JoshuaJWilborn]

Hello again @Narretz Are these 2 more error files similar to the one I just made or a regular doc page?

[Narretz]

Hi @JoshuaJWilborn, for these error you'll need to look into the code and go from there to write a description. I think $route:norout is pretty simple to document, $parse:lval maybe a bit more involved.

[petebacondarwin]

Why the breaking change @Narretz ? This is a docs only change, right?

[Narretz]

@petebacondarwin the BC is only for #15844 (comment), because changing the error identifier is technically a BC for apps that check for a specific error code. Very small, but still. Documentation is the description, or the error document - this applies to the other errors listed

[petebacondarwin]

Regarding this.throwError('IMPOSSIBLE') - the error is actually throw $parseMinErr('esc', 'IMPOSSIBLE');. We should leave that in place. It is there to catch a programming error slipping into the code in the future.

[petebacondarwin]

Regarding the tpload error, the change was introduced by @jbedard here: #13701 (comment)

I think to keep things simple we should just remove the $templateMinErr variable and reuse the $compileMinErr variable.

Actually I think we should fix the '$compile' parameter and put it in 1.7.0.

(And it is not worth trying to change the minerr extraction tool :-) )

[Narretz]

@petebacondarwin do you mean the tpload error should have its own namespace, i.e. $templateRequest?

[petebacondarwin]

1 2 and 3 are fixed on master (56b6ba8, and f1c164c)
4 is partially fixed on master (56b6ba8) and will be completely fixed via #16461