Fix last line of the file not being parsed

Cargo.lock

@@ -1117,7 +1117,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "snekdown"
-version = "0.21.2"
+version = "0.21.3"
 dependencies = [
  "asciimath-rs 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "base64 0.12.3 (registry+https://github.com/rust-lang/crates.io-index)",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "snekdown"
-version = "0.21.2"
+version = "0.21.3"
 authors = ["trivernis <trivernis@protonmail.com>"]
 edition = "2018"
 license-file = "LICENSE"

src/format/assets/style.css

@@ -12,7 +12,6 @@ body {
     padding: 2rem;
     margin: auto;
     background-color: #FFF;
-    box-shadow: 1em 1em 1em gray;
 }
 
 h1 {

src/parser/line.rs

@@ -154,11 +154,12 @@ impl ParseLine for Parser {
         }
 
         if self.ctm.check_char(&LB) {
-            self.ctm.seek_one()?;
+            if let Ok(_) = self.ctm.seek_one() {
                 if self.ctm.check_char(&LB) {
                     text.add_subtext(Inline::LineBreak)
                 }
             }
+        }
 
         if text.subtext.len() > 0 {
             Ok(text)